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A127780 A127775 * A002260 as infinite lower triangular matrices. 0
1, 3, 6, 5, 10, 15, 7, 14, 21, 28, 9, 18, 27, 36, 45, 11, 22, 33, 44, 55, 66, 13, 26, 39, 52, 65, 78, 91, 15, 30, 45, 60, 75, 90, 105, 120 (list; table; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Odd number transform of A002260.

Row sums = A002414: (1, 9, 30, 70, 135,...)

EXAMPLE

First few rows of the triangle are:

1;

3, 6;

5, 10, 15;

7, 14, 21, 28;

9, 18, 27, 36, 45;

11, 22, 33, 44, 55, 66;

...

CROSSREFS

Cf. A127775, A002260, A002414.

Sequence in context: A046083 A196068 A123089 * A118413 A096620 A093419

Adjacent sequences:  A127777 A127778 A127779 * A127781 A127782 A127783

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 28 2007

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Last modified February 13 10:20 EST 2012. Contains 205451 sequences.